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dll: dirbuf:

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- FspFileSystemAcquireDirectoryBufferEx takes hint for initial capacity.
- Buffer allocation strategy has been improved to minimize reallocation.
- Quick sort of directory entries now implements median of three partitioning. This improves performance of sorting already sorted data.
This commit is contained in:
Bill Zissimopoulos
2022-03-22 16:47:40 +00:00
parent 868812d248
commit 7527155cb8
4 changed files with 102 additions and 20 deletions
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64
tst/winfsp-tests/dirbuf-test.c
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@@ -21,6 +21,7 @@
#include <winfsp/winfsp.h>
#include <tlib/testsuite.h>
#include <strsafe.h>
#include <time.h>
#include "winfsp-tests.h"
@@ -145,7 +146,7 @@ static void dirbuf_dots_test(void)
FspFileSystemDeleteDirectoryBuffer(&DirBuffer);
}
static void dirbuf_fill_dotest(unsigned seed, ULONG Count, ULONG InvalidCount)
static void dirbuf_fill_dotest(unsigned seed, ULONG Count, ULONG InvalidCount, BOOLEAN Presort)
{
PVOID DirBuffer = 0;
NTSTATUS Result;
@@ -162,6 +163,7 @@ static void dirbuf_fill_dotest(unsigned seed, ULONG Count, ULONG InvalidCount)
ULONG DotIndex = Count / 3, DotDotIndex = Count / 3 * 2;
WCHAR Marker[MAX_PATH];
ULONG N, MarkerIndex, MarkerLength;
UINT64 PresortIndex = 0;
srand(seed);
@@ -189,12 +191,18 @@ static void dirbuf_fill_dotest(unsigned seed, ULONG Count, ULONG InvalidCount)
DirInfo->FileNameBuf[0] = L'.';
DirInfo->FileNameBuf[1] = L'.';
}
else
else if (!Presort)
{
N = 24 + rand() % (32 - 24);
for (ULONG J = 0; N > J; J++)
DirInfo->FileNameBuf[J] = 'A' + rand() % 26;
}
else
{
N = 24;
StringCbPrintfW(DirInfo->FileNameBuf, 64, L"FILEFILE%016llx", PresortIndex);
PresortIndex++;
}
DirInfo->Size = (UINT16)(sizeof(FSP_FSCTL_DIR_INFO) + N * sizeof(WCHAR));
Success = FspFileSystemFillDirectoryBuffer(&DirBuffer, DirInfo, &Result);
@@ -212,7 +220,7 @@ static void dirbuf_fill_dotest(unsigned seed, ULONG Count, ULONG InvalidCount)
typedef struct
{
SRWLOCK Lock;
ULONG Capacity, LoMark, HiMark;
ULONG InitialCapacity, Capacity, LoMark, HiMark;
PUINT8 Buffer;
} FSP_FILE_SYSTEM_DIRECTORY_BUFFER;
FSP_FILE_SYSTEM_DIRECTORY_BUFFER *PeekDirBuffer = DirBuffer;
@@ -348,31 +356,60 @@ static void dirbuf_fill_test(void)
{
unsigned seed = (unsigned)time(0);
dirbuf_fill_dotest(1485473509, 10, 0);
dirbuf_fill_dotest(1485473509, 10, 3);
dirbuf_fill_dotest(1485473509, 10, 0, FALSE);
dirbuf_fill_dotest(1485473509, 10, 3, FALSE);
for (ULONG I = 0; 10000 > I; I++)
{
dirbuf_fill_dotest(seed + I, 10, 0);
dirbuf_fill_dotest(seed + I, 10, 3);
dirbuf_fill_dotest(seed + I, 10, 0, FALSE);
dirbuf_fill_dotest(seed + I, 10, 3, FALSE);
}
for (ULONG I = 0; 1000 > I; I++)
{
dirbuf_fill_dotest(seed + I, 100, 0);
dirbuf_fill_dotest(seed + I, 100, 30);
dirbuf_fill_dotest(seed + I, 100, 0, FALSE);
dirbuf_fill_dotest(seed + I, 100, 30, FALSE);
}
for (ULONG I = 0; 100 > I; I++)
{
dirbuf_fill_dotest(seed + I, 1000, 0);
dirbuf_fill_dotest(seed + I, 1000, 300);
dirbuf_fill_dotest(seed + I, 1000, 0, FALSE);
dirbuf_fill_dotest(seed + I, 1000, 300, FALSE);
}
for (ULONG I = 0; 10 > I; I++)
{
dirbuf_fill_dotest(seed + I, 10000, 0);
dirbuf_fill_dotest(seed + I, 10000, 3000);
dirbuf_fill_dotest(seed + I, 10000, 0, FALSE);
dirbuf_fill_dotest(seed + I, 10000, 3000, FALSE);
}
}
static void dirbuf_presort_fill_test(void)
{
unsigned seed = (unsigned)time(0);
for (ULONG I = 0; 10000 > I; I++)
{
dirbuf_fill_dotest(seed + I, 10, 0, TRUE);
dirbuf_fill_dotest(seed + I, 10, 3, TRUE);
}
for (ULONG I = 0; 1000 > I; I++)
{
dirbuf_fill_dotest(seed + I, 100, 0, TRUE);
dirbuf_fill_dotest(seed + I, 100, 30, TRUE);
}
for (ULONG I = 0; 100 > I; I++)
{
dirbuf_fill_dotest(seed + I, 1000, 0, TRUE);
dirbuf_fill_dotest(seed + I, 1000, 300, TRUE);
}
for (ULONG I = 0; 10 > I; I++)
{
dirbuf_fill_dotest(seed + I, 10000, 0, FALSE);
dirbuf_fill_dotest(seed + I, 10000, 3000, FALSE);
}
}
@@ -472,5 +509,6 @@ void dirbuf_tests(void)
TEST(dirbuf_empty_test);
TEST(dirbuf_dots_test);
TEST(dirbuf_fill_test);
TEST(dirbuf_presort_fill_test);
TEST(dirbuf_boundary_test);
}